Gearing.



PATENTED OCT. 9, 1906.

B. ROBERT. GEARING.

APPLIOATION FILED FEB-15,1906.

'tion-clutch. A defect UNITED STATES rgrnn'r cams no. scopes.

Specification of Letters Patent.

Patented Oct. 9,1908, I

Application filed Fcbruary 15, 1906. Serial lie, 3011258 To all whom, itmay concern:

Be it known that I, EUGEN Ronnar, a sub-- ject of the German Emperor,residing at Frankfort-on-the-Main, in the Kingdom of Prussia and GermanEmpire, have" invented new and useful Improvements in Gearing, of whichthe following is a specification.

In centrifugal cream -se arators of the type in which the drum is rivcnby means of a worm and worm-wheel it is a common practice to mountthcworm on the drumshaft, which hangs in a ball-bcaring, in such mannerthat the worm is free to turn on the shaft, but can lie-coupled with itby a fricof such so arators is that in conse names of the sud en shockswhich the rapi ly-rotating drum experiences the teeth, especially thoseof the worm-- Wheel, frequently break ofl, since the drumshaft transmitsthe shock to the Worm and the teeth of the worm-wheel. Furthermore, theclutch-s ring, located above the worm, owing to t e pressure exertedupon it through the direction of rotation of the worm-wheel, isunequally influenced. The" worm-teethaccordingly wear down rapidly,since by reason of the trembling motion of the yielding sprin theyexecute an up-anddown movement ietwcen the teeth of the wheel. l

All the above drawbacks are overcome by means of the driving-gearforming the subject of my invention. 7

The essential features of the new gear are, first, that the drum-shaftis mcuntcdso as to slide in thc worm, which itself is held in aninvariable osition; secondly, that the worm is cause to bear a ainst theballbearing (which carries-the rum and drumshaft) with the aid of asleeve, which may be independent of the worm or be formed in one piecetherewith; thirdly, that the rotation of the drum-shaft is effected withthe aid of a friction or toothed clutch actuated b a spring, whichclutchinay be applied a ove the'worm between it and the sleeve, or, inthe case of the worm and sleeve being in one piece, at the bottom of theworm, or a friction or toothed-clutch may be furnished at both ends ofthe worm. With such drivinggear the shocks of the drum, which cause ajerking rising motion of the shaft, are taken up hythe ball-bearinganddiminished' by the s ring, while the worm always retains its war gposition-that is to say,

. which the shaft experiences at its periphery in the split-clutch ringi, which will tight can neither causc shocks in the teeth nor'eke-I cuteupward-down vibrations. My invention is illustrated panying drawings, inwhich Figure 1 is a longitudinal sectional view of in the .a'ccomj -ithe ncw driving-gear, showing the drum shaft in the ordinary workingposition the shaft raised, owing to a" shock taking place.

The drum-shaft a, to the bottom end cl which the drum is secured, hangs,as ordinarily, in the ball-bearing c on .the conical. head (1, securedto the top end of the shaft. f is the worm, which. sits loosely on theshaft a. It is held in position, however, by means of a sleeve 9, whichbears against the ball-bearing t secured in the machine-frame by screwsm or the like, the worm being acted upon by a spring h, the other end'of which bears against a collar on the shaftn. Between the. pring it andthe worm f there is rovided a utch-ring i, which is peripheral y slit atk and engages with the worm by means of con, ical friction-contactsurfaces. I There may be a like connection between the worm and! thesleeve g, or the two latter};

rts may-be" madein one piece. The sha a, can slide} within the worm f,sleeve 9, and ring i; but on rotation of the worm by the worm-wheel s itwill be carried round, owing to the friction oy reason of the, ressureof the spri being forced ti ht i into the worm.

grip the shaft on account of its conical and sleeve 9, or ring i in suchmannerv that though the shaft is capable of sliding in the said parts itcannot turn' therein is not to connection of t e shaft a with the wormf, 7

cult. If, on the other hand, the parts on commencin driving turn on theshaft a rotation 'of t e latter takes place gradually through frictionand the speed of rotation likewise increases gradually. Should-the drumduring working from an cause experience a shock, the shaft, depen ingupon the extent of the obstruction, will rise more or less, This,however, does not have any effect on the worm, as it would in ordinaldriving gears, for, as Fig. 2 shows, the sha t sliding in the worm risessomewhat 'tornatic' action of the latter to com "The binding of theclutchring i on the shaft vat, while being sufiicient to cause arotation of the said shaft, will not interfere with the risand fallingmovements of the shaft or auensatc for shocks abo vc set forth, becausew on the worm-wheel s rotates the full relative speed i set up betweenthe same and the worm f may not'be imparted to the shaft (1 when theseparator starts. During the operation of the shaft a, drum will have acertain increasing momentum imparted thereto, and as this momenturnincreases gradually the binding of the clutch-ringi on the shaft a isnot any greater than it was in the starting movement of the mechanism,but in point of fact is sufficient shaft.

turn and a shoe;

,' worm f,

,. sha t down to normal position,

by Fig. 1.:

i. 4 said shaft may not I 'wheel 8 and worm f,

not be similar to a speed of rotation in appasuch force as only toinsure a rotation of the shaft a, though have a speed of rotationproportionate to the dimensions of the wormor, in other words, may

ratus of this class having the worm fast to the Therefore a release willensue when the drum has ac uired an increase in momenis imparted to saiddium and which will allow the shaft a to rise by a nick movement or slipthrough the ring i, and sleeve 9 and occupy the position shown by Fig.2. When the effect of the shock has ceased, the shaft will againgravitate, owing to the weight of the drum, the we: ht of t e drumtending always to draw the as illustrated It must not be understoodthatthe ring 'i is pushed upwardly extrenntyof the worm f by th to'tightlycontract the ring and cause it to bind'on the shaft or to establish ailuill jam between the upper conical surface of thering and the lowerend of the worm, only such degree of frictional engagement of the ringwith respect to the worm being maintained as to set up a rotation of theshaft a.

which may he gradual at first, the

Y seated against into the lower e spring h with eeaose invention, 1claim as new-.-

' 1. Inagearing,ineombinationavertically-.

a ball-bearing, carried sliding drum-shaft;

in which the'shaft 1S susthe machine-frame, pended; a

caring against the ball-bearir 3, a spring-actu ated clutch mounted onthe shaft and coupling it with the worm; and a worm-wheel meshing withthe worm; all operating in such manner that on. the separator-drumexperiencing a shock, the shaft rises, while the worm is held in itsinvariable working osition on the new driving-gear, therefore, all

overcome and the wear of the worm mounted on the shaft and.

the shaft by the bearing and the c utch sub stantially as described.

2. In a gearing, in combination a vert callysliding drum-shaft; aball-bearing, carried by the machine-frame, in which the shaft issuspended; aworm loosely mounted on the shaft; a loose sleeve on theshaft, the top of which sleeve presses against the ball-bearing, whilethe bottom is coupled with the top of the worm; a spring-actuated splitclutch on the shaft, coupling it with the ot'tom of the worm and worm;all operating scribed.

3. A frame or support having a ball-bear- 'ing, a shaft sus ended fromsaid ball-bearing, loosely about the shaft and the ball-bearing, a wormplaced loosely about the shaft and seated against the sleeve, aclutch-ring about the a sleeve place shaft, and a spring for moving thering to the Worm, said clutch-ring being adapted to grip the shaft androtate the same while allowing the shaft to slide longitudinallyindependently of the ring and worm.

a worm-Wheel meshing with the.

substantially as de- In testimony whereof Ihave hereunto set my hand inthe presence of two subscribing witnesses. J v

' EUGEN ROBERT.

- Witnesses:

JEAN Gnunn, CARL Grimm).

